mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-24 11:41:07 +00:00
350eb336e3
* configure.in: Use test -f instead of test -e. Patch by John Tobey <jtobey@banta-im.com>. * sysdeps/unix/sysv/sysv4/solaris2/sparc/sys/trap.h: New file. * sysdeps/unix/sysv/sysv4/solaris2/sys/syscall.h: New file. * sysdeps/unix/sysv/sysv4/solaris2/bits/sigstack.h: New file. * sysdeps/unix/sysv/linux/sigstack.c: Fix typo. * sysdeps/unix/sysv/sysv4/solaris2/sigwaitinfo.c: Fix typo. * sysdeps/unix/sysv/sysv4/solaris2/sparc/sys/ucontext.h: New file. * sysdeps/unix/sysv/sysv4/solaris2/sys/param.h: New file. Patches by John Tobey <jtobey@banta-im.com>.
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/* Emulate sigstack function using sigaltstack.
|
|
Copyright (C) 1998 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <signal.h>
|
|
#include <stddef.h>
|
|
#include <sys/syscall.h>
|
|
|
|
|
|
#ifdef __NR_sigaltstack
|
|
int
|
|
sigstack (ss, oss)
|
|
const struct sigstack *ss;
|
|
struct sigstack *oss;
|
|
{
|
|
stack_t sas;
|
|
stack_t *sasp = NULL;
|
|
stack_t osas;
|
|
stack_t *osasp = oss == NULL ? NULL : &osas;
|
|
int result;
|
|
|
|
if (ss != NULL)
|
|
{
|
|
/* We have to convert the information. */
|
|
sas.ss_sp = ss->ss_sp;
|
|
sas.ss_flags = ss->ss_onstack ? SS_ONSTACK : 0;
|
|
|
|
/* For the size of the stack we have no value we can pass to the
|
|
kernel. This is why this function should not be used. We simply
|
|
assume that all the memory down to address zero (in case the stack
|
|
grows down) is available. */
|
|
sas.ss_size = ss->ss_sp - NULL;
|
|
|
|
sasp = &sas;
|
|
}
|
|
|
|
/* Call the kernel. */
|
|
result = __sigaltstack (sasp, osasp);
|
|
|
|
/* Convert the result, if wanted and possible. */
|
|
if (result == 0 && oss != NULL)
|
|
{
|
|
oss->ss_sp = osas.ss_sp;
|
|
oss->ss_onstack = (osas.ss_flags & SS_ONSTACK) != 0;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
link_warning (sigstack, "the `sigstack' function is dangerous. `sigaltstack' should be used instead.")
|
|
#else
|
|
# include <sysdeps/generic/sigstack.c>
|
|
#endif
|